1968 Baracuda

I wanted a 340 because thats what I wanted when I was 18 , I just like the power , i've seen worked 318's and they are ok but still don't have the power of the 340 . just thinking 440 because they are more plentiful and less money . Don't really plan on racing alot but I grew up in a small town full of mopars 440, 383 , 440 and hemi's and never got to have one , now I will . plus I have a grandson interested in muscle cars instead of rice burners and need to impress.